You'd be surprised
Actually, the operating system could make a difference, as my theory about the problem is gelling into certainty. It's a software module outside of IE, one that's standard in some versions of Windows but not in others, and may or may not get loaded during a software update. Those guys...FireFox, OTOH, has everything it needs built in, and you're guaranteed not to have to worry about silliness like that. Where I used to try to be fair and say that both are pretty good, now I'll recommend FireFox over IE unequivocally. We just don't need that crap.